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Date: Tue, 2 Apr 2013 15:13:08 -0700 From: Greg Kroah-Hartman <gregkh@...uxfoundation.org> To: linux-kernel@...r.kernel.org Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>, stable@...r.kernel.org, Andreas Degert <andreas.degert@...glemail.com>, Joerg Roedel <joro@...tes.org> Subject: [ 19/68] iommu/amd: Make sure dma_ops are set for hotplug devices 3.4-stable review patch. If anyone has any objections, please let me know. ------------------ From: Joerg Roedel <joro@...tes.org> commit c2a2876e863356b092967ea62bebdb4dd663af80 upstream. There is a bug introduced with commit 27c2127 that causes devices which are hot unplugged and then hot-replugged to not have per-device dma_ops set. This causes these devices to not function correctly. Fixed with this patch. Reported-by: Andreas Degert <andreas.degert@...glemail.com> Signed-off-by: Joerg Roedel <joro@...tes.org> Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org> --- drivers/iommu/amd_iommu.c | 20 +++++++++----------- 1 file changed, 9 insertions(+), 11 deletions(-) --- a/drivers/iommu/amd_iommu.c +++ b/drivers/iommu/amd_iommu.c @@ -2270,18 +2270,16 @@ static int device_change_notifier(struct /* allocate a protection domain if a device is added */ dma_domain = find_protection_domain(devid); - if (dma_domain) - goto out; - dma_domain = dma_ops_domain_alloc(); - if (!dma_domain) - goto out; - dma_domain->target_dev = devid; + if (!dma_domain) { + dma_domain = dma_ops_domain_alloc(); + if (!dma_domain) + goto out; + dma_domain->target_dev = devid; - spin_lock_irqsave(&iommu_pd_list_lock, flags); - list_add_tail(&dma_domain->list, &iommu_pd_list); - spin_unlock_irqrestore(&iommu_pd_list_lock, flags); - - dev_data = get_dev_data(dev); + spin_lock_irqsave(&iommu_pd_list_lock, flags); + list_add_tail(&dma_domain->list, &iommu_pd_list); + spin_unlock_irqrestore(&iommu_pd_list_lock, flags); + } dev->archdata.dma_ops = &amd_iommu_dma_ops; -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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